Sand pipe for rock drills



July 2, 1935. c. c. HANSEN 2,006,829

-SAND PIPE FOR ROCK DRILLS Filed March 9, 1934 INVENTOR. l fianlesflansen.

H I S A TTORNEY Patented July 2, 1935 ,SAND PIPEFOR ROCK DRILLS Charles C. Hansen, Easton, Pa, assignor to In gersoll-Rand Company, Jersey City, N. J., a

corporation of New Jersey Application March 9, 1934, Serial No. 714,750

6 Claims. (Cl. 25551) 'I'his'inve'ntion relates to drilling mechanism of Q the type employed'for drilling submergedmaterial, such asrock underlying a bodyvof water, and more particularly to a sand pipe adapted to extend through the loose material covering the rock for guiding the drill steeland to .preventthe entrance of overburden into the drill hole.

One object of the invention isj-toassure a substantial area of contact between the end or seating surface of the sand'p-ipe and the material being drilled.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference numerals refer to similar parts, 7

Figure 1 is a sectional elevation of a sand pipe constructed in accordance with the practice of the invention and drilling mechanism whereby the sand pipe may be rotated,

Figure 2 is a transverse view taken through Figure 1 on the line 2-2, and

Figure 3 is a View similar to Figure 1 illustrating the manner in which the motion of the rotation mechanism of the rock drill may be transmitted to the sand pipe through the drill steel used for drilling the rock.

Referring more particularly to the drawing, 20 designates, in general, submarine drilling mechanism which may be substantially like that disclosed in United States Patent No. 1,610,372 granted to C. C. Hansen, December 14:, 1926 and which, as in the patent, is adapted to be mounted upon a scow or other suitable support (not shown) for drilling holes in the rock 2| constituting the bed of a stream.

The drilling mechanism accordingly comprises a rock drill 22 of the reciprocatory percussive type of which only an end of the hammer piston 23 is shown. In the lower or front end of the rock drill is a rotary chuck 24 having suitable projections or surfaces 25 therein .for engagement with lugs 26 of a working implement 21. On the periphery of the chuck 24 are gear teeth 28 which mesh with a pinion 25 on a shaft 30 rotated by a motor 3| through suitable intermeshing gearing carried by the motor and the shaft.

The rock drill 22 is mounted upon a frame 32 which may be slidable, vertically, with respect to the support upon which it is mounted for placing the rock drill in close proximity to the work and thereby avoiding the need of excessively long drill steels.

As in the patent, the drilling mechanism is provided with a supplemental frame 33 which maybe raised and lowered with respect to' the frame32, in a well known manner. The frame 33 comprisesa pair of rods 34 carrying attheir lower ends a foot piece or guide member 35 which -may be secured to the rods as by nuts 36. In the guide member 35 is a sleeve bearing 31 for a sand 5 pipe '38 which seats upon the rock M to guide the working implement 2i. I

The sand pipe, constructed in accordancewith the practice of the invention, is providedat' its lower end with threads 39 for engagement with 10 threads 4B carried by a tubular cutting element 41 having at its opposite or lower end a series of teeth 52 for cutting a channel in the rock 2! The sand pipe 38 may be permanently connected to the guide member 3i as by providing it with a pair of opposed shoulders 44 and 45 which bear against the upper and lower surfaces, respectively, of the guide member 3?.

The upper end of the sand pipe, as is customary, is in the form of a funnel 45 which serves to facilitate the insertion of the working implement thereinto. In the rim of the funnel are slots 41 for the reception of a bar 48 extending through a tube 49 threaded on an enlarged portion 50 of the working implement 21. 25

Preferably, a water box 5i is arranged about the enlarged portion 59 and a conduit 52 is threaded to the water box to convey water to the channel 43 to remove the cuttings from the channel. A passage 53 in the working imple- 3o ment communicates the interior of the tube 49 with the conduit 52.

If desired, the bar 48 may be secured to an ordinary drill steel 2'! as by a clamping plate 54 and bolts 55 extending-through the plate 54 and 35 the bar 48. The wings or ends of the bar 48 may then engage the notches 41 in the sand pipe and the cutting bit of the working implement may extend into the sand pipe 38 to centralize the working implement with respect to the sand pipe.

In practice, whenever it is desired to start a new drill hole the frame 33 is lowered to drive the sand pipe through the overburden until the cutting teeth 42 of the sand pipe seat upon the rock 2|. In cases where,'owing to the contour of the rock face, a considerable space exists between it and areas of the end surface of the sand pipe so that portions of the overburden could readily find their way into the drill hole the implement 21 is inserted in the sand pipe' and positioned so that the bar 48 engages the notch 41. The sand pipe is then rotated by the motor 3| through the elements connecting V the two until a channel 43 is cut into the rock 2| 'to a depth sufiicient to permit the entire end area of the sand pipe to contact with the rock.

Where a working implement, such as that illustrated in Figure 1, is being employed for rotating the sand pipe the working implement V is then replaced bythe usual drill steel and the hammer piston 23 is set in operation to actuate the drill for forming the drill hole. During the normal drilling operation, as during the cutting of the channel 43, water is introduced into the drill hole through the working"'implement,for

.tion, clutch means on the sand pipe for en- ,gagement with a rotary member, and cutting teeth at one end of the sand Pip 2. A sand pipe having .a funnel portion at one end to facilitate insertion of a working implement into the sand pipe, clutch means on the tunnel for engagement with arotating member, and cutting teeth onthe other end of the sand 3. A sand pipe having a funnel portion at one end to facilitate insertion of a working 'imple-' ment into the sand pipe, clutch means on the 7 Sand pipe for engagement with a rotating mem- I 7 her, a sleeve threadedly connected to the other end of the sand pipe, and teethin the end or the sleeve to cut a seating surface for the sand pipe. a 1 r ,4. In a drill unit for submarine drilling, the combination of a plurality of frames and a guide member on one.of the frames. a' rock drill on a,

another framehaving a rotary chuck, a sand pipe in the guide member having arock cutting portion, and means for transmitting the rotary movement of the chuckto the'sand pipe.

. 5. In a drillfunit for submarine drilling, the combination of a plurality 01' frames and a guide member on one'ot the frames, a rock drill on ,another frame havingpa rotary chuck, a sand pipe in the guide member, cutting teeth on the sand pipe, and means interlockingly engaging the chuck and the sand pipe for transmittingthe rotary motion 01 the chuck to the sand pipe.

6. ma drill unit for submarine drilling, the combination oi'a plurality of frames and a guide member on one of the frames, a rock drill on another frame having a rotary chuck, a sand pipe guided by the guide member, cutting teeth on one end of thesand pipe, andmeans inter-.

locked with the chuck and with thefopposite end of the sand pipe to transmit the rotary movement of the chuck to the sand pipe. V

CHARLES c. mmsmz. Y 

